Harddrive size being reported incorrectly?

[Jerry McAllister]

> 
> On Thursday 29 December 2005 12:22 pm, Jerry McAllister wrote:
> > > Now, I understand that harddrive manufacturers measure things differently
> > > (1000kbytes per gbyte rather than 1024, or something like that) than
> > > expected, but I've been told by a few people that I should be getting
> > > around 305-312GB of available space after the drive has been formatted.
> >
> > They didn't do their arithmetic.
> >
> > When you slice and partition the drive, there will likely be a handful
> > of sectors that don't round out to an even value so those are dropped.
> > Then, when you do the newfs, some space is taken by the spare superblocks
> > and finally the system reserves 8%.     So, I would say you are getting
> > it all.
> 
> 289GB is before the 8% reservation. I actually turned that off with tunefs.

I strongly suggest you do not do that - at least completely off.
Reduce it some, if you like, but keep some.

////jerry

> 
> Thanks to all who responded so quickly, makes me feel better about filling the 
> drive up. Wanted to verify this before using the drive as to not end up 
> having to re-newfs it in the future to gain back any possible unused space.
> 
> Thanks,
> -- 
> Travis Poppe
> IRC: tlp @ irc.freenode.net
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